Teisou Gyakuten Sekai De Yuiitsu No Otoko Kishi No Ore, Onna Kishi Gakuen Ni Nyuugaku Shitara Nazeka Eiyou Atsukai Sareta ~Zetsurin Skill De Harem Musou~

Alternative

貞操逆転世界で唯一の男騎士の俺、女騎士学園に入学したらなぜか英雄扱いされた ～絶倫スキルでハーレム無双～ ; I, The Only Male Knight In A Chastity-Reversed World, Entered The Female Knight Academy And Was Treated As A Hero For Some Reason - Unrivaled In The Harem With My Unequaled Skills